Combined throttle and reversing valve.



. A. HACKETT.

COMBINED THROTTLE AND REVERSING VALVE. APPLICATION FILED MAY 13, 1911.

' Patnted F8b.20, 1912.

m .C-l 1\ 4 5 i s W- UNITED STATES PATENT OFFICE.

ALFRED HACKETT, OF TORONTO, ONTARIO, CANADA.

COMBINED THROTTLE AND REVERSING VALVE.

To all whom it may concern:

Be it known that I, ALFRED HAOKETT, a subject of the King of GreatBritain, residing at the city of Toronto, in the county of York,Province of Ontario, Canada, have invented certain new and usefulImprovements in Combined Throttle and Reversing Valves for Motors, ofwhich the following is a specification.

My invention relates to improvements in combined throttle and reversingvalves for motors, and the objects of my invention are firstly: toprovide a valve for the purpose set forth whereby with the use of asingle throttle lever, and eccentric-rod, the motor or final mover maybe set in motion to any extent; checked at intermediate points, and alsoreadily reversed; secondly: to design a type of valve which willdispense with the disadvantages resulting from the great frictionpresent in connection with the use of the ordinary D slide-valve;thirdly: to provide means for adjusting the valves in my device, each inits seat, so that while insuring snug fit thereof, they will beprevented from jamming, and my preferred form of valve consists of twovalves mounted in a valvecasing, the first valve controlling the passageand path of the steam, and the second valve performing the function ofthe ordinary slide-valve in respect of controlling the ingress andegress of the steam with respect to the cylinder. Each valve is dividedinto two separated compartments, each compartment having one or moreports which co-act with ports formed in the valve casing. Athrottlelever is provided for operating the first-mentioned valve and aneccentric-rod for the secondmentioned valve, as hereinafter particularlyexplained.

Figure 1 is a plan view of my valve. Fig. 2 is a vertical longitudinalsection on the line ab, Fig. 1, looking in the direction in dicated byarrow with plain tail. Fig. 3 is a vertical longitudinal section on theline a-5, Fig. 1, looking in the direction indicated by arrow withcrossed tail. Fig. 4: is a vertical transverse section on the line ccZ,Fig. 1. Fig. 5 is a side elevation of the reversingvalve. Fig. 6 is atransverse section on the line e Fig. 4, on a reduced scale, through thelower portion of the reversing-valve and its seat, and Figs. 7 and 8 areperspective views of the distributing valve operated by theeccentric-rod.

In the drawings, like characters of refer- Specification of LettersPatent.

Application filed May 13, 1911.

Patented Feb. 20, 1912. Serial No. 626,943.

ence indicate corresponding parts in each 1 figure.

It will of course be understood by one skilled in this art that theports in the distributingvalve and its seat are so placed in order tohave the usual co-act-ion so as to;

give a correct distribution of the steam to and from the cylinder.

A is the valve-casing provided with a chamber B having intake andexhaust ports C and D. Mounted to operate within cham-" A. and in whichoperates the distributingvalve J. The distributing-valve J is dividedinto two separate chambers K and L by a partition M. The inner end ofeach port C and D is flared as shown particularly at 2, Fig. 1, and atthe outset it must be under stood that the ports in the reversing-valveE will always each be in communication with its respective inner end ofthe said ports C and D.

For the purpose of illustrating the operation of my valve, we willsuppose that the port 3 in the valve E (see Fig. 6) has been moved intoalinement with the port 4 in the valve-casing A by the movement of thevalve E through the medium of its throttle-lever N. The chamber F isalways full of live steam because the range of movement of the port 3 isalways such as to keep this port in communicative position with respectof the inner end of the intake port C. Now the steam escapes from'theport 4 through the port 5 into the chamber L, and as the port 6 of thevalve J is in communication with the port 7 formed in the base 0 of thevalvecasing A, and with the port P formed in the valve-seat Q, the steamescapes through these ports into the cylinder 8 through the port 9, andso operates the piston 10. When the ports 6 and 7 are open, the exhaustport 11 formed in the valve J opens into the exhaust port 12 (see Fig.3) formed in the base 0 and the port R formed in the valve-seat Q, andconsequently any steam there may be in the cylinder 8 in front of thepiston 10 escapes through the port 18 into the exhaust ports 12 and R,through the port 11 into the chamber K, thence from this chamber throughthe exhaust port 13 into the exhaust port 14 whence it escapes into thechamber G of the valve E. When the port 3 was moved to open into theport 4, the port 15 of the valve E was moved to communicate with theport 14, and therefore free exhaust is had from the chamber G throughthe port 15 into the exhaust port D. In due course, the eccentric-rod1G, controlling the movement of the distributing-valve J, will have beenseparated so as to bring the port 17 of the valve J, into communicationwith the port 18 formed in the base 0. The port 17 opens into thechamber L of the valve J which is filled with live-steam, consequentlythe live-steam escapes into the cylinder 8 through the ports 18, a, and19 and so drives the piston from dotted position back into the positionillustrated in full lines. Of course as the ports 17 and 18 are opening,the ports 6 and 7 and 11 and 12 are closing. The steam in front of thepiston 10, as it moves from dotted position, escapes through theexhaust-port 20 into the exhaustports b and 21, and as the exhaust-port22 in the valve J has been moved to communicate with the exhaust-port21, the steam escapes into the chamber K thence through the exhaust-port13 into the exhaust 14 to the chamber G, whence it escapes through theexhaust-port 15 into the exhaust-port D. Now in order to reverse theengine, the valve E is operated so as to bring the port 3 intocommunication with the port 23, and the port 15 into communication withthe port 24. The live steam passes through the ports 23, and 13 into thechamber K, and as the port 22 is supposed to open into the ports 21 andZ), the steam escapes from the port 20 and acts on the piston 10. Whenthe ports 21 and 22 are open, the port 17 communicates with the ports13, a and 19, and consequently the exhaust steam escapes through theseports 'into the chamber L and thence through the port 5 to the port 24and from this port through the port 15, the chamber G and thence fromthe port 15 to the exhaust port I). So soon as the piston has reachedthe limit of its described movement, the port 11 communicates with theports 12, R and 13, thus allowing live steam to escape into the cylinder8 through these ports from the chamber K and act against the piston.When the port 11 communicates with the ports 12 and R, the port 6 is incommunication with the ports 7, P and 9, and consequently the exhauststeam escapes from these ports into the chamber L through the port 5into the port 24 and through these ports to the port 15 into the chamberGr whence it escapes through the port 15 to the exhaust port D. It willbe understood that at all times the chamber F of the valve E receivesthe live steam, and that the chamber G of this valve receives theexhaust steam.

The eccentric-rod 16 is connected by a lever 16 with the stem 16 of thevalve J. The valve J is tapered as shown as well as the walls of thechamber 1: this construction enables me to provide a snug fit for thisvalve. Surrounding the valve-stem 16 is a coiled-spring 25, which isheld between the cap 26 and one end of the valve J so as to hold saidvalve on its seat. In order to prevent the valve from jamming, I providethe following construction. Screwing through the cap 27 (secured by thescrews 28 or other suitable means to the valve-casing) is athreaded-stud 29, which contacts with a block 30 held in a recess formedin the outer surface of the end 31 of the valve J. Screwing on the stud29 is a nut 32 which locks this stud in its adjusted position. By meansof the spring 25 and its associated parts, the valve J is held snugly inits scat. By screws 33 or other suitable means, the cap 26 is secured tothe valvecasing. The valve E is also tapered, as well as the walls ofthe chamber B. The partition H is longitudinally provided with a bore 34through the axis of the valve E. The upper end of the valve E isprovided' with a sleeve 35 internally threaded through which passes astud 36 which is threaded at its upper end to co-act with the threadedsleeve This stud 36 projects beyond the bottom of the valve E and restsagainst a block 37 held in a cavity formed in the bottom of the chamberB. Vithout further description it will. be understood that by reason ofthe co-action between the stud 36 and block 37 while the valve E willsnugly fit its seat, still it will be prevented from jammingthereagainst.

38 is a cap secured by any suitable means, such as screws 39, to the topof the valvecasing A above the top of the valve E.

Surrounding the sleeve 35 and resting against the valve E and housed bythe cap 38, is a spring 40 which keeps this valve spring-held againstits seat.

The inner end 41 of the throttle-lever N is secured by a screw 42, orother suitable means, to the top of the sleeve 35.

43 and 44 are pins or stops preferably carried by the cap 38 with whichthe throttle-lever N is thrown into contact. hen the port 3 opens intothe port 4, the lever N will be in contact with the pin or stop 43; andwhen the port 3 communicates with the port 23, the lever N will be incontact with the stop or pin 44.

Upon referring particularly to Fig. 6, it will be seen that in theposition of the valve E therein illustrated, the engine is throttled:only when the port 3 communicates with either of the ports 4 and 23 issteam allowed to pass into the cylinder. It is therefore evident that bymeans of the valve E perfect control is had over the movement of thesteam engine.

The ports 5 and 13 are always in communication with the ports co-actingtherewith formed in the valve-casing A. In respect of the ports 6, 7, 11and 12, illustrated in Fig. 1, the ports in the valve J are shown largerthan the ports in the valve-seat or 5 base merely for the purpose ofillustration, as will be understood.

It is now clear to one skilled in this art that the chambers K and L atdifferent times receive live steam and exhaust steam 0 according to thedirection of movement of the engine. 1

While I have described what I consider to be the best embodiment of myinvention, I desire it to be understood that I do not confine myself tothe construction herein shown and described, except in so far as thatmay be made necessary by the requirements of the prior art and the termsof my claims.

Upon referring particularly to Figs. 1, 7,

o and 8, it will be noticed that'the ports 6 and 17 of the valve J arecloser together than the ports 11 and 22, and that these pairs of portscoact respectively with the ports 7 and 18 and 12 and 21 formed in thebase 0. The ports 7 and 18 are farther apart than the ports 12 and 21.The ports 7 and 18 arefarther apart than the ports 6 and 17, and theports 12 and 21 are closer together than the ports 11 and 22. Duringmove- 0 ment of the distributing-valve J, it will be noticed uponreferring particularly to Fig. 1, that the ports 6 and 17, when closed,are positioned bet-ween the ports 7 and 18, and that the ports 11 and 22are, when closed, positioned outside of the space separating the ports12 and 21'. In this disclosure of my invention, the said ports areplaced as described as to give me the desired co-action therebetween.

0 IVhat I claim as my invention is 1. A valve of the class describedcomprising a valve-casing provided with a first chamber provided withintake and exhaust ports, and further provided with a second- 5 chamberconnected with the first-mentioned chamber by a pair of live-steam portsand a pair of exhaust-steam ports; a reversing valve mounted in thefirst-mentioned chamher; a partition dividing this valve into two 0separate chambers each of which is provided with a port; adistributing-valve mounted within said second-mentioned chamber; a

partition dividing this valve into two distinct chambers, each of thesaid chambers being provided with a port which co-acts with itsrespective pair of said livesteam and exhaust-steam ports, and the saidchambers being further each provided with a pair of ports which co-actwith ports in said 0 valve-casing whereby the ingress and egress ofsteam to and from acylinder is controlled, as and for the purposespecified.

2. A valve of the class described comprising a valve-casing providedwith a first-- 5 chamber provided with intake and exhaust ports, andfurther provided with a secondchamber connected with the first-mentionedchamber by a pair of live-steam and a pair of exhaust-steam ports, theends of which opening into the first-mentioned chamber are spaced apart;a reversing valve mounted in the first-mentioned chamber; a partitiondividing this valve into two separate chambers each of which is providedwith a port which operate respectively between the ends of the saidlive-steam and exhaust-steam ports opening into the first-mentionedchamber, for the purpose set forth; a distributingvalve mounted withinsaid second-mentioned chamber; a partition dividing this valve into twodistinct chambers, each of the said chambers being provided with a portwhich co-acts with its respective pair of said livesteam andexhaust-steam ports, and the said chambers being further each providedwith a pair of ports which co-act with ports in said valve-casingwhereby the ingress and egress of steam to and from a cylinder iscontrolled, as and for the purpose specified.

3. A valve of the class described comprising a valve-casing providedwith a firstchamber provided with intake and exhaust ports, the innerend of each of which is flared as described, and further provided with asecond-chamber connected with the first-mentioned chamber by a pair oflivesteam and a pair of exhaust-steam ports; a reversing valve mountedin the first-mentioned chamber; a partition dividing this valve into twoseparate chambers each of which is provided with a port; means forlimiting the range of movement of said valve so that the live-steamchamber thereof will always be in communication with said intake-port,and the exhaust steam chamber thereof will always be in com municationwith said exhaust port; a distributing valve mounted within saidsecondmentioned chamber; a partition dividing this valve into twodistinct chambers, each of the said chambers being provided with a portwhich co-act with its respective pair of said live-steam andexhaust-steam ports, and the said chambers being further each providedwith a pair of ports which co-act with ports in said valve casingwhereby the ingress and egress of steam to and. from the cylinder iscontrolled, as and for the purpose specified.

4. A valve of the class described comprising a valve-casing providedwith a firstchamber provided near its upper end with intake and exhaustports, the inner end of each of which is flared, as described, andfurther provided with a second-chamber connected with thefirst-mentioned chamber by a pair of live-steam ports and a pair ofexhaust-steam ports, the upper ends of which open into thefirst-mentioned chamber near the bottom thereof and are spaced apart; areversing valve mounted in the first-mentioned chamber; a partitiondividing this valve into two separate chambers each of which is providedwith a port, means for limiting the range of movement of said valve sothat'the ports opening from the said chambers thereof can be made toregister at will with the desired one of the said live-steam, and thedesired one of said exhaust-steam ports; a distributing-valve mountedwithin said second mentioned chamber; a partition. dividing this valveinto two distinct chambers, each of the said chambers being providedwith a port which co-acts with its respective pair of said livesteam andexhaust-steal'n ports, and the said chambers being further each providedwith a pair of ports which co act with ports in said valve-casingwhereby the ingress and egress of steam to and from a cylinder iscontrolled, as and for the purpose specified.

5. A valve of the class described comprising a valve-casing providedwith a chamber provided near its upper end with intake and exhaust portsthe inner ends of each of which is flared, as described, and furtherprovided with a pair of live-steam, and exhaust-steam, ports, openingfrom said chamber near the bottom thereof and spaced apart; a reversingvalve mounted in said chamber; a partition dividing this valve into twoseparate chambers each of which is provided with a port, and means forlimiting the range of movement of said valve so that the ports openingfrom the said chambers thereof can be made to register, at will, withthe desired one of the said live-steam, and the desired one of saidexhaust-steam, ports, as and for the purpose specified.

6. A valve of the class described comprising a valve-casing providedwith a chamber with which communicates a pair of livesteam, and a pairof exhaust-steam, ports; a distributing-valve mounted to operate withinsaid chamber; a partition dividing this *alve into two distinctchambers, each of the said chambers being provided with a port whichco-acts with its respective pair of said live-steam and exhaust-steamports, the said chambers being further each provided with a pair ofports which co-act with ports in said valve-casing whereby the ingressand egress of steam to and from a cylinder is controlled, as and for thepurpose specified.

7 A valve of the class described comprising a valve-casing provided witha chamber with which communi ates a pair of livesteam, and a pair ofexhaust-steam, ports; a distributingvalve mounted to operate within saidchamber; a partition dividing this valve into two distinct chambers,each of the said chambers being provided with a port which co-acts withits respective pair of said. live-steam and exhauststeam ports, the saidchai'nbers being further each provided with a pair of ports which co-actwith ports in said valve-casing whereby the ing ss and egress of steamto and from a cylinder is controlled, and a valve controlling thepassage and path of steam to and from said distributingvalve, as and forthe purpose specified.

8. A valve comprising a valve-casing provided with a tapered-chamberhaving intake and exhaust ports; a tapered valve resting in saidchamber; a partition longitudinally provided with a bore, the saidpartition extending above the top of the valve in the "term of a sleevewhich is internally threaded at its upper end; a stud resting in saidhere and having its upper end threaded to engage with the threaded partsof said sleeve; the said stud projecting beyond the bottom of said valveand contacting with a block carried by the v'alve-casing at the bottomof said chamber to prevent the valve from be ing ammed in its seat; acoiled spring surrounding the said sleeve and a cap secured to saidvalve-casing and above said valve and through which said sleeve extends,and housing said spring, as and for the purpose specified.

9. A valve of the class described comprising a valve-casing providedwith a first chamber provided with intake and exhaust ports, the innerend of each of which is flared as described, and further provided with asecond-chamber connected with the first-mentioned chamber by a pair oflivesteam and a pair of exhaust-steam ports; a reversing valve mountedin the first-mew tioned chamber: a partition dividing this valve intotwo separate chambers each of which is provided with a port; means forlimiting the range of movement of said valve so that the live-steamchamber thereof will always be in communication with said intake-port,and the exhaust-steam chamber thereof will always be in communica tionwith said exhaust-port; a distributingvalve mounted within saidsecond-mentioned chamber; a partition dividing this valve into twodistinct chambers, each of the said chambers being provided with a portwhich co-acts with its respective pair of said live-steam andeXhaust-steam ports,

and the said chambers being further each provided with a pair of portswhich co-act with ports in said valve-casing whereby the ingress andegress of steam to and from the cylinder is controlled, one pair of thesaid pairs of ports of said distributingvalve being closer together thanthe other pair of said ports of this valve, and co-acting with a pair ofthe said ports in said valve-casing which are wider apart than the same;this pair of ports inthe said valve-casing being wider apart than theother pair of ports in said valve-casing with which co-act thesecond-mentioned pair of ports in said distributing-valve which arewider apart than the same.

10. A valve of the class described comprising a valve-casing providedwith a chamber with which communicates a pair of live-steam and a pairof exhaust-steam, ports; a distributing-valve mounted to operate withinsaid chamber; a partition dividing this valve into two distinct chambers, each of the said chambers being provided with a port which co-actswith its respective pair of said live-steam and exhauststeam ports, thesaid chambers being further each provided with a pair of ports whichco-act with ports in said valve-casing whereby the ingress and egress ofsteam to and from a cylinder is controlled, one pair of the said pairsof ports of said distributing-valve being closer together than the otherpair of said ports of this valve, and co-acting with a pair of the saidports in said valve-casing which are wider apart than the same; thispair of ports in the said valve-casing being wider apart than the otherpair of ports in said valve-casing with which co-act thesecond-mentioned pair of ports in said distributing-valve which arewider apart than the same.

11. A valve of the class described com prising the combination of avalve-casing having a chamber provided with ports, and further providedwith a second-chamber communicating with said first-chamber; a hollowcylindrical distributing valve, mounted in said secondchamber, andprovided with a transverse partition dividing the valve into twoseparate chambers, each of the said chambers being provided with aplurality of ports opening through the side of said valve; the saidvalve-casing being further provided with ports leading from saidsecond-chamber to the engine cylinder; means, under the control of theengine, for operating said distributing-valve so that the ports thereinwill co-act with the ports opening into and out of said second-chamherto permit steam to do work, and a valve mounted in said first-chambercontrolling the passage of steam to said distributingvalve, through theports leading from said first-mentioned chamber to said secondchamber,as set forth.

12. A valve of the class described comprising a valvecasing providedwith a chamber provided with ports leading from a source of supply forthe motive fluid, and further provided with ports leading to and fromthe cylinder of an engine; a hollow cylindrical distributingvalvemounted to operate in said chamber, and provided with a transversepartition dividing the valve into two separate chambers, each of thesaid chambers being provided with intake and exhaust ports, which co-actwith the intake and exhaust ports leading to the engine cylinder; sothat when steam is being received into the said engine-cylinder throughone of the ports in one of said chambers formed in saiddistributing-valve, steam is escaping from said cylinder, through one ofsaid ports of the other chamber of said distributing-valve diagonallyplaced in respect of the said one port of the said one of said chambersof said distributing-valve, into this said other chamber, and out ofthis said other chamber through an exhaustport formed therein, andescaping from said valve-casing by one of said ports formed therein, anda valve controlling the passage of steam into said valve-casing.

13. A valve of the class described comprising a valve-casing providedwith a chamber provided with ports leading from a source of supply forthe motive fluid, and further provided with ports, grouped in pairs,leading to and from the cylinder of an engine; a hollowdistributing-valve mounted to operate in said chamber; a partitiondividing said valve into two distinct chambers each of which is providedwith three ports, two ports in each chamber being grouped together toform a pair, and which co-act with their respective pair of ports insaid casing leading to said engine cylinder, the ports in said valve onone side of said partition, according to the direction in which theengine is running, being intake ports, and the remaining ports in saidvalve being exhaust ports; means, under the control of the engine, foroperating said distributingvalve, and a valve controlling the passageand path of motive fluid to and from said distributing-valve.

In testimony whereof I have aPfiXed my signature in presence of twowitnesses.

ALFRED HACKETT. Witnesses:

S. C. TEACHER, Row. L. SHANNON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

